The North Atlantic Ocean, simply the North Atlantic, was situated to the east of North America and west of the British Isles. (PROSE: The Americas, TV: The Lie of the Land)
History
The Great Auk lived in the North Atlantic until 1844, when it was hunted to extinction by humans. (PROSE: The Last Dodo [+]Loading...["The Last Dodo (novel)"])
In 1943, during the Second World War, U-boats operated in the North Atlantic. (TV: The Curse of Fenric) It was the namesake of the North Atlantic Treaty Organisation, developed in the late 1940s after the war. (PROSE: Endgame)